1 | /* |
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2 | * Copyright 2005 Sun Microsystems, Inc. All rights reserved. |
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3 | * Use is subject to license terms. |
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4 | */ |
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5 | |
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6 | #ifndef _GRUB_UFS_H |
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7 | #define _GRUB_UFS_H_ |
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8 | |
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9 | /* ufs specific constants */ |
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10 | #define UFS_SBLOCK 16 |
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11 | #define UFS_SBSIZE 8192 |
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12 | #define UFS_MAGIC 0x011954 |
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13 | #define ROOTINO 2 /* i number of all roots */ |
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14 | #define UFS_NDADDR 12 /* direct blocks */ |
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15 | #define UFS_NIADDR 3 /* indirect blocks */ |
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16 | #define MAXMNTLEN 512 |
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17 | #define MAXCSBUFS 32 |
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18 | #define MAXNAMELEN 256 |
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19 | |
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20 | /* file types */ |
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21 | #define IFMT 0xf000 |
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22 | #define IFREG 0x8000 |
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23 | #define IFDIR 0x4000 |
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24 | |
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25 | typedef unsigned char grub_uchar_t; |
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26 | typedef unsigned short grub_ushort_t; |
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27 | typedef unsigned short grub_o_mode_t; |
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28 | typedef unsigned short grub_o_uid_t; |
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29 | typedef unsigned short grub_o_gid_t; |
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30 | typedef uint32_t grub_ino_t; |
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31 | typedef int32_t grub_int32_t; |
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32 | typedef int32_t grub_uid_t; |
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33 | typedef int32_t grub_gid_t; |
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34 | typedef uint32_t grub_uint32_t; |
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35 | typedef uint32_t grub_daddr32_t; |
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36 | typedef uint32_t grub_time32_t; |
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37 | typedef struct { int val[2]; } grub_quad_t; |
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38 | |
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39 | struct timeval32 { |
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40 | grub_time32_t tv_sec; |
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41 | grub_int32_t tv_usec; |
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42 | }; |
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43 | |
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44 | /* |
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45 | * Per cylinder group information; summarized in blocks allocated |
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46 | * from first cylinder group data blocks. These blocks have to be |
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47 | * read in from fs_csaddr (size fs_cssize) in addition to the |
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48 | * super block. |
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49 | * |
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50 | * N.B. sizeof (struct csum) must be a power of two in order for |
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51 | * the ``fs_cs'' macro to work (see below). |
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52 | */ |
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53 | struct csum { |
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54 | grub_int32_t cs_ndir; /* number of directories */ |
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55 | grub_int32_t cs_nbfree; /* number of free blocks */ |
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56 | grub_int32_t cs_nifree; /* number of free inodes */ |
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57 | grub_int32_t cs_nffree; /* number of free frags */ |
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58 | }; |
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59 | |
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60 | /* Ufs super block */ |
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61 | struct fs { |
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62 | grub_uint32_t fs_link; /* linked list of file systems */ |
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63 | grub_uint32_t fs_rolled; /* logging only: fs fully rolled */ |
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64 | grub_daddr32_t fs_sblkno; /* addr of super-block in filesys */ |
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65 | grub_daddr32_t fs_cblkno; /* offset of cyl-block in filesys */ |
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66 | grub_daddr32_t fs_iblkno; /* offset of inode-blocks in filesys */ |
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67 | grub_daddr32_t fs_dblkno; /* offset of first data after cg */ |
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68 | grub_int32_t fs_cgoffset; /* cylinder group offset in cylinder */ |
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69 | grub_int32_t fs_cgmask; /* used to calc mod fs_ntrak */ |
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70 | grub_time32_t fs_time; /* last time written */ |
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71 | grub_int32_t fs_size; /* number of blocks in fs */ |
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72 | grub_int32_t fs_dsize; /* number of data blocks in fs */ |
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73 | grub_int32_t fs_ncg; /* number of cylinder groups */ |
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74 | grub_int32_t fs_bsize; /* size of basic blocks in fs */ |
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75 | grub_int32_t fs_fsize; /* size of frag blocks in fs */ |
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76 | grub_int32_t fs_frag; /* number of frags in a block in fs */ |
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77 | /* these are configuration parameters */ |
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78 | grub_int32_t fs_minfree; /* minimum percentage of free blocks */ |
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79 | grub_int32_t fs_rotdelay; /* num of ms for optimal next block */ |
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80 | grub_int32_t fs_rps; /* disk revolutions per second */ |
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81 | /* these fields can be computed from the others */ |
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82 | grub_int32_t fs_bmask; /* ``blkoff'' calc of blk offsets */ |
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83 | grub_int32_t fs_fmask; /* ``fragoff'' calc of frag offsets */ |
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84 | grub_int32_t fs_bshift; /* ``lblkno'' calc of logical blkno */ |
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85 | grub_int32_t fs_fshift; /* ``numfrags'' calc number of frags */ |
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86 | /* these are configuration parameters */ |
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87 | grub_int32_t fs_maxcontig; /* max number of contiguous blks */ |
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88 | grub_int32_t fs_maxbpg; /* max number of blks per cyl group */ |
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89 | /* these fields can be computed from the others */ |
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90 | grub_int32_t fs_fragshift; /* block to frag shift */ |
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91 | grub_int32_t fs_fsbtodb; /* fsbtodb and dbtofsb shift constant */ |
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92 | grub_int32_t fs_sbsize; /* actual size of super block */ |
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93 | grub_int32_t fs_csmask; /* csum block offset */ |
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94 | grub_int32_t fs_csshift; /* csum block number */ |
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95 | grub_int32_t fs_nindir; /* value of NINDIR */ |
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96 | grub_int32_t fs_inopb; /* value of INOPB */ |
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97 | grub_int32_t fs_nspf; /* value of NSPF */ |
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98 | /* yet another configuration parameter */ |
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99 | grub_int32_t fs_optim; /* optimization preference, see below */ |
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100 | /* these fields are derived from the hardware */ |
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101 | /* USL SVR4 compatibility */ |
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102 | /* |
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103 | * * USL SVR4 compatibility |
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104 | * |
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105 | * There was a significant divergence here between Solaris and |
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106 | * SVR4 for x86. By swapping these two members in the superblock, |
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107 | * we get read-only compatibility of SVR4 filesystems. Otherwise |
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108 | * there would be no compatibility. This change was introduced |
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109 | * during bootstrapping of Solaris on x86. By making this ifdef'ed |
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110 | * on byte order, we provide ongoing compatibility across all |
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111 | * platforms with the same byte order, the highest compatibility |
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112 | * that can be achieved. |
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113 | */ |
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114 | grub_int32_t fs_state; /* file system state time stamp */ |
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115 | grub_int32_t fs_si; /* summary info state - lufs only */ |
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116 | grub_int32_t fs_trackskew; /* sector 0 skew, per track */ |
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117 | /* unique id for this filesystem (currently unused and unmaintained) */ |
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118 | /* In 4.3 Tahoe this space is used by fs_headswitch and fs_trkseek */ |
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119 | /* Neither of those fields is used in the Tahoe code right now but */ |
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120 | /* there could be problems if they are. */ |
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121 | grub_int32_t fs_id[2]; /* file system id */ |
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122 | /* sizes determined by number of cylinder groups and their sizes */ |
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123 | grub_daddr32_t fs_csaddr; /* blk addr of cyl grp summary area */ |
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124 | grub_int32_t fs_cssize; /* size of cyl grp summary area */ |
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125 | grub_int32_t fs_cgsize; /* cylinder group size */ |
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126 | /* these fields are derived from the hardware */ |
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127 | grub_int32_t fs_ntrak; /* tracks per cylinder */ |
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128 | grub_int32_t fs_nsect; /* sectors per track */ |
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129 | grub_int32_t fs_spc; /* sectors per cylinder */ |
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130 | /* this comes from the disk driver partitioning */ |
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131 | grub_int32_t fs_ncyl; /* cylinders in file system */ |
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132 | /* these fields can be computed from the others */ |
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133 | grub_int32_t fs_cpg; /* cylinders per group */ |
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134 | grub_int32_t fs_ipg; /* inodes per group */ |
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135 | grub_int32_t fs_fpg; /* blocks per group * fs_frag */ |
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136 | /* this data must be re-computed after crashes */ |
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137 | struct csum fs_cstotal; /* cylinder summary information */ |
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138 | /* these fields are cleared at mount time */ |
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139 | char fs_fmod; /* super block modified flag */ |
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140 | char fs_clean; /* file system state flag */ |
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141 | char fs_ronly; /* mounted read-only flag */ |
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142 | char fs_flags; /* largefiles flag, etc. */ |
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143 | char fs_fsmnt[MAXMNTLEN]; /* name mounted on */ |
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144 | /* these fields retain the current block allocation info */ |
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145 | grub_int32_t fs_cgrotor; /* last cg searched */ |
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146 | /* |
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147 | * The following used to be fs_csp[MAXCSBUFS]. It was not |
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148 | * used anywhere except in old utilities. We removed this |
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149 | * in 5.6 and expect fs_u.fs_csp to be used instead. |
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150 | * We no longer limit fs_cssize based on MAXCSBUFS. |
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151 | */ |
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152 | union { /* fs_cs (csum) info */ |
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153 | grub_uint32_t fs_csp_pad[MAXCSBUFS]; |
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154 | struct csum *fs_csp; |
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155 | } fs_u; |
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156 | grub_int32_t fs_cpc; /* cyl per cycle in postbl */ |
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157 | short fs_opostbl[16][8]; /* old rotation block list head */ |
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158 | grub_int32_t fs_sparecon[51]; /* reserved for future constants */ |
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159 | grub_int32_t fs_version; /* minor version of MTB ufs */ |
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160 | grub_int32_t fs_logbno; /* block # of embedded log */ |
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161 | grub_int32_t fs_reclaim; /* reclaim open, deleted files */ |
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162 | grub_int32_t fs_sparecon2; /* reserved for future constant */ |
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163 | /* USL SVR4 compatibility */ |
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164 | grub_int32_t fs_npsect; /* # sectors/track including spares */ |
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165 | grub_quad_t fs_qbmask; /* ~fs_bmask - for use with quad size */ |
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166 | grub_quad_t fs_qfmask; /* ~fs_fmask - for use with quad size */ |
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167 | grub_int32_t fs_postblformat; /* fmt of positional layout tables */ |
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168 | grub_int32_t fs_nrpos; /* number of rotaional positions */ |
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169 | grub_int32_t fs_postbloff; /* (short) rotation block list head */ |
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170 | grub_int32_t fs_rotbloff; /* (grub_uchar_t) blocks for each */ |
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171 | /* rotation */ |
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172 | grub_int32_t fs_magic; /* magic number */ |
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173 | grub_uchar_t fs_space[1]; /* list of blocks for each rotation */ |
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174 | /* actually longer */ |
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175 | }; |
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176 | |
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177 | struct icommon { |
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178 | grub_o_mode_t ic_smode; /* 0: mode and type of file */ |
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179 | short ic_nlink; /* 2: number of links to file */ |
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180 | grub_o_uid_t ic_suid; /* 4: owner's user id */ |
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181 | grub_o_gid_t ic_sgid; /* 6: owner's group id */ |
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182 | grub_uint32_t ic_sizelo; /* 8: number of bytes in file */ |
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183 | grub_uint32_t ic_sizehi; /* 12: number of bytes in file */ |
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184 | struct timeval32 ic_atime; /* 16: time last accessed */ |
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185 | struct timeval32 ic_mtime; /* 24: time last modified */ |
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186 | struct timeval32 ic_ctime; /* 32: last time inode changed */ |
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187 | grub_daddr32_t ic_db[UFS_NDADDR]; /* 40: disk block addresses */ |
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188 | grub_daddr32_t ic_ib[UFS_NIADDR]; /* 88: indirect blocks */ |
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189 | grub_int32_t ic_flags; /* 100: cflags */ |
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190 | grub_int32_t ic_blocks; /* 104: 512 byte blocks actually held */ |
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191 | grub_int32_t ic_gen; /* 108: generation number */ |
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192 | grub_int32_t ic_shadow; /* 112: shadow inode */ |
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193 | grub_uid_t ic_uid; /* 116: long EFT version of uid */ |
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194 | grub_gid_t ic_gid; /* 120: long EFT version of gid */ |
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195 | grub_uint32_t ic_oeftflag; /* 124: extended attr directory ino, */ |
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196 | /* 0 = none */ |
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197 | }; |
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198 | |
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199 | struct direct { |
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200 | grub_ino_t d_ino; |
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201 | grub_ushort_t d_reclen; |
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202 | grub_ushort_t d_namelen; |
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203 | char d_name[MAXNAMELEN + 1]; |
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204 | }; |
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205 | |
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206 | /* inode macros */ |
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207 | #define INOPB(fs) ((fs)->fs_inopb) |
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208 | #define itoo(fs, x) ((x) % (grub_uint32_t)INOPB(fs)) |
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209 | #define itog(fs, x) ((x) / (grub_uint32_t)(fs)->fs_ipg) |
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210 | #define itod(fs, x) ((grub_daddr32_t)(cgimin(fs, itog(fs, x)) + \ |
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211 | (blkstofrags((fs), \ |
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212 | ((x) % (grub_uint32_t)(fs)->fs_ipg / (grub_uint32_t)INOPB(fs)))))) |
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213 | |
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214 | /* block conversion macros */ |
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215 | #define UFS_NINDIR(fs) ((fs)->fs_nindir) /* # of indirects */ |
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216 | #define blkoff(fs, loc) ((int)((loc & ~(fs)->fs_bmask))) |
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217 | #define lblkno(fs, loc) ((grub_int32_t)((loc) >> (fs)->fs_bshift)) |
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218 | /* frag to blk */ |
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219 | #define fsbtodb(fs, b) (((grub_daddr32_t)(b)) << (fs)->fs_fsbtodb) |
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220 | #define blkstofrags(fs, b) ((b) << (fs)->fs_fragshift) |
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221 | |
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222 | /* cynlinder group macros */ |
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223 | #define cgbase(fs, c) ((grub_daddr32_t)((fs)->fs_fpg * (c))) |
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224 | #define cgimin(fs, c) (cgstart(fs, c) + (fs)->fs_iblkno) /* inode block */ |
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225 | #define cgstart(fs, c) \ |
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226 | (cgbase(fs, c) + (fs)->fs_cgoffset * ((c) & ~((fs)->fs_cgmask))) |
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227 | |
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228 | #endif /* !_GRUB_UFS_H */ |
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